on January 2, 2023
What simple, effective techniques for obfuscating points are available?
Geographic Information SystemsWhat are the obfuscation techniques? Obfuscation is an umbrella term for a variety of processes that transform data into another form in order to protect sensitive information or personal data. Three of the most common techniques used to obfuscate data are encryption, tokenization, and data masking. What is the name of the technique used to
on January 2, 2023
Produce NDVI on Landsat1 satellite images?
Geographic Information SystemsHow to calculate NDVI from Landsat 7? (NIR – R) / (NIR + R) In Landsat 4-7, NDVI = (Band 4 – Band 3) / (Band 4 + Band 3). In Landsat 8-9, NDVI = (Band 5 – Band 4) / (Band 5 + Band 4). How to create NDVI? Now, let’s go through the
on January 2, 2023
How do I insert rows into a spatial table within a geopackage file via a SQL INSERT statement?
Geographic Information SystemsHow do I use GPKG files? GPKG is not a simple file format like . csv or .To import from GPKG format: Choose File-Import from the main menu. In the Import dialog browse to the folder containing data of interest. Double-click the . gpkg file desired. Everything found in that . gpkg database will be
on January 2, 2023
QGIS DXF contours with elevation
Geographic Information SystemsHow do I export contours with elevation in QGIS? Right click the 3D vector contour layer, select Export then Save Feature As.. The save as window will show up like figure 6. Choose AutoCAD DXF for Format and specify the output path. In CRS option, the coordinate system of exported output CAD can be changed
on January 2, 2023
Convert x, y, z local points to WGS84 having only 3 coordinates known
Geographic Information SystemsHow do I convert local coordinates to WGS84? How to convert to WGS84: Select the Input SRS (the default format is WGS84). Input the coordinates in a decimal degrees (DD) format. Click “Transform” to quickly convert coordinates. Get your coordinates in the WGS84 on your display. How do you convert XYZ coordinates to latitude and
on January 2, 2023
Display the resulting value of the sql.execute query into a <div>
Geographic Information SystemsWhat will be the output on execution of SQL query? The SQL SELECT statement gives you the result of the select query that you have executed and the output of that is stored in table. So after execution we get table. How to store SQL query result in a variable C#? This could be the
on January 2, 2023
ASCII encoding error when updating field content in SQL Server table
Geographic Information SystemsHow to set UTF-8 encoding in SQL Server? UTF-8 is not a character set, it’s an encoding. The character set for UTF-8 is Unicode. If you want to store Unicode text you use the nvarchar data type. If the database would use UTF-8 to store text, you would still not get the text out as
on January 2, 2023
Vector cropping failure
Geographic Information SystemsWhat were the causes of crop failure? Crops fail due to drought, floods, pest attack or any other calamity. Infertility of land does not lead to crop failure. It leads to lower yields. What is meant by crop failure? (krɒp ˈfeɪljə ) a failure of crops to yield sufficient food, etc, to maintain a community
on January 2, 2023
Copying features from one layer into different layer using ArcGIS for Desktop?
Geographic Information SystemsNote: Click the Edit tool. on the Editor toolbar. Click the feature you want to copy. Hold down SHIFT while clicking features to select additional features. Click the Copy button. on the Standard toolbar. Click the Paste button. on the Standard toolbar. Click the layer in which to store the pasted feature. … Click OK.
on January 2, 2023
Why is Overpass-turbo map empty if there is data?
Geographic Information SystemsHow does overpass API work? Overpass API doesn’t offer changeset-based criteria. It’s possible to work around that, by using time-based diffs, but this may be clumsy. Overpass API also can’t give you full history of an object, but time-based selection criteria can give you the state of an object at a certain time. How do